Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 5, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP05(2018)092
Keywords
Higher Spin Symmetry; Conformal Field Theory; Field Theories in Lower Dimensions; Higher Spin Gravity
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Funding
- Simons Foundation, through the Simons Collaboration on the Non-perturbative Bootstrap
- National Science and Engineering Council of Canada
- Simons Foundation, through the Simons Collaboration It from Qubit
- National Science Foundation [PHY-160-7611]
- Department of Energy [DE-FG02-91ER40671]
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We derive constraints on two-dimensional conformal field theories with higher spin symmetry due to unitarity, modular invariance, and causality. We focus on CFTs with War symmetry in the irrational regime, where c > N - 1 and the theories have an infinite number of higher-spin primaries. The most powerful constraints come from positivity of the Kac matrix, which (unlike the Virasoro case) is non-trivial even when c > N - 1. This places a lower bound on the dimension of any non-vacuum higher-spin primary state, which is linear in the central charge. At large c, this implies that the dual holographic theories of gravity in AdS(3), if they exist, have no local, perturbative degrees of freedom in the semi-classical limit.
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